Longspined Sea Urchin Population and Fishing Model Outputs for East Coast Tasmania
Updated 1mo ago
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Description
A size-structured stock assessment model tracks the abundance and growth of the invasive long-spined sea urchin (Centrostephanus rodgersii) across nine regions on the east coast of Tasmania. The model, described in a journal article in final preparation, simulates population dynamics from 1960 to 2160, with a focus on management options for the next 5 to 10 years. Output files include predicted urchin density, model fits from RStan, and projections for a scenario with no commercial fishing.
Use Cases
Assessing the impact of commercial fishing on sea urchin density based on the 'biomean' and 'nevermean' output classes
Evaluating model fit and recruitment function parameters based on the RStan-produced 'fitsum' outputs
Comparing projected population trajectories under different management scenarios across nine geographic regions
Studying the historical spread and growth of an invasive species since its first recorded presence in Tasmania in 1978
Strengths
Model covers a 200-year simulation period from 1960 to 2160, providing long-term projections
Outputs are provided for nine distinct geographic regions on the east coast of Tasmania
Includes a counterfactual scenario ('nevermean') projecting density if no commercial fishing occurred
Limitations
Column-level documentation is absent; field semantics must be inferred after download
Row count is unknown, which may limit suitability assessment
The underlying model and its assumptions are fully described in an associated journal article still in final preparation
Provenance
Source
Australian Ocean Data Network via data_gov_au
Collection Method
Output from a size-structured stock assessment model, generated through model testing and fitting.
Time Range
1960 to 2160 (model simulation), with focus on past 15 years and next 5-10 years
Freshness
Last updated 2026-04-28 18:55:46.616152; freshness should be verified
Geography
Nine regions on the east coast of Tasmania, Australia
Data is packaged in ZIP format alongside PNG and HTML files; license information is unknown.